These are added directly rather than imported by update.sh since they
require local modifications and its not worth breaking everyone's git
forks yet to import them through cvs2git.
There are so many test exceptions that need handling that it is easier
to simply edit it directly rather than doing autogeneration anymore.
This also puts biotest and pidwraptest behind a new --enable-extratests
option, so they are easy to run but are not enabled by default.
